Lubricating oil cell



April 15, 1947. R B GRAY ErAL 2,419,016

LUBRICATING OIL CELL Filed latch 19, 1942 a/L Am/5A' uns Hdl/6 AYE/i A50- 6W5/VE ML ym gnam mamar, Lamm Patented Apr. 15, 1947 l LUBRICATING QIL CELL Reid B. Gray, Dundalk, and Joseph C. De Weese,

Essex, Md.,`asslgnors to The Company, Middle '-River, Md.,

Maryland Glenn L. Martin incorporation of Application March 19, 1942, semi No. 435,414

vexible, substantially non-elastic cell or bag composed of a plurality of laminated sheets of material secured together, the several sheets possessing physical and chemical characteristics that vimpart to the completed structure the desired qualities for retaining hot oil.

The bag or cell constructed of the present novel laminated sheet may be used as the interior of a rigid walled tank, or may `b eplaced Within a frame or holder of the type disclosed in Gray and Zivi, Patent 2,102,590. Invthis prior patent there is disclosed the broad idea of mounting a exible walled inner container Within a rigid outer container and wherein the normal volumetric capacity or exterior dimensions of the inner flexible container are slightly larger than the normal volumetric capacity or interior dimensions of the exterior container, whereby the inner container is under some degree of compression and there is no likelihood of friction or wear thereof against the outer container.

In the accompanying drawings:

Fig. 1 is a, diagrammatic view of an inner flexible cell or bag I, made in accordance with the following specification, supported within an exterior rigid tank or frame l0. f

Fig. 2 is an enlarged cross-section through the improved cell wall.

Specifically, the hot oil reservoir is made of any desired size or conguration and consists of a ilexible, substantially'non-elastic bag composed of a plurality of pliable, non-stretchable sheets cemented together with the innermost sheet, in

contact with the hot oil, composed of a resistant l 2 Claims. (C1. 154-435) of ilfty per cent Vistanex and fifty per cent natural rubber.

Exterior of the layer 5 is a soft vulcanized rubber layer 1, to which is secured an outer layer 9, composed of high strength cotton fabric or a glass fabric. This latter layer is resistant to abrasion and prevents elongation "of the cell per se. It will -be understood that the several layers are cemented or otherwise secured together toform a unitary laminated structure.

This particular form of non-elastic, laminated cell has Ibeen found peculiarly 'well adapted for retaining hot lubricating oil when constructed in the `form of an inner cell mounted in an exterior tank or holder of slightly smaller dimensions than the flexible cell.

Although the thickness of the several layers 3, 5, 'l and 9 may vary and are not strictly critical, a practical form of cell has been constructed wherein the inner oil resistant layer is .0025 in thickness, the synthetic or compound layer 5 is .004 in thickness, the soft vulcanized rubber layer 1 is .094 in thickness and the exterior high strength resistant cotton or glass fabric layer 9 is .007 in thickness.

What we claim is: 1. A self-sealing hydrocarbon liquid storag containercomprising a metal frame, a flexible cell within said frame, the outer dimensions of the cell being proportioned with respect to the inner dimensions of the frame so that the hydrostatic load of the liquid is transmitted to said frame, the cell walls being unstressed by the liquid load, the walls of said cell being free of the frame and including at least four layers arranged in the sequence named; a layer of synthetic plastic material resistant to the chemical action of the hydrocarbon liquid to be held in said tank, a layer comprising substantially a high molecular weight isc-butene polymer subject to swelling upon contact with the hydrocarbon liquid, a soft vulcanized protective layer, and an outer fabric layer, all of said layers being adhesively secured to adjacent layers to form a laminar structure.

2. Al self-sealing hydrocarbon liquid storage container comprising a metal frame, a flexible cell within said frame, the outer dimensions of the cell being proportioned with respect to the inner dimensions of the frame so that the hydrostatic load of the liquid is transmitted-to said frame, the cell walls being unstressed by the liquid load, the walls of said cell being free of the frame and including at least four layers arran ed in the sequence named; a layer of synthe ic plastic material resistant to the chemical action of the hydrocarbon liquid to be held in said tank, a-layer comprising substantially 50% of high molecular weight iso-butene polymer and 50% natural rubber subject to swelling upon contact with the hydrocarbon liquid, a soft vulcanized protective layer, and an outer fabric layer, al1 of said layers being adhesively secured to adjacent layers to form a. laminar structure.

REID B. GRAY. JOSEPH C. DE WEESE.

REFERENCES CITED UNI'I'ED STATES PATENTS Number Name Date Habgood Nov. 22, 1938 Gray et a1. Deo. 21, 1937 Poberejsky May 5, 1931 Mercier June 9, 1896 Conradi Nov. 24, 1936 Conradi Ju1y,19. 1938 Wiezevich Dec. 6, 1938 Voorhees Mar. 19, 1940 Thacher Mar. 11. 1919 FOREIGN PATENTS Country Date French Jan. 12, 1937 British Aug. 29, 1941 British Aug. 20, 1941 -O'II-IBIR REFERENCES Number Name Date 1,397,383 Macbeth Nov. 15, 1921 Th deOiSiOn 0f the U. S. C. C. P. A. in In re 1,386,791 Murdock Aug. 9, 1921 20 Ware, 544 0. G. 45'?. 

